The final week of the regular season is here and there are still some things to settle, most notably the final playoff spots and postseason seeding. In the AFC, the Ravens, Titans, Chargers and Bills are still alive for wild-card spots. In the NFC, the Falcons and Seahawks are vying for the final wild-card spot.

With that, here’s a look at The Post’s NFL High Five for Week 17:

Rookie QB debut to watch

The game has no consequence in the playoff race, but it is of significance to Chiefs fans.

After a season of fan anticipation, the Chiefs will start rookie first-round draft pick Patrick Mahomes II at quarterback in Sunday’s regular-season finale against the Broncos. They’re able to give Mahomes his first NFL start because the 9-6 Chiefs are locked into the No. 4 seed in the AFC playoffs as AFC West champions.

Mahomes, whom the Chiefs traded up 17 spots to No. 10 in the first round to draft, has been the No. 2 quarterback all season, but hasn’t played in a game.

So Chiefs coach Andy Reid, in an effort to both rest veteran Alex Smith and give Mahomes some valuable experience, opted to make this move.

“Every snap that he gets is a valuable snap for him for whenever he has that chance of getting in there [as the full-time starter], Fortunately, we’re in a situation where we can do that,” Reid said.

Mahomes, who many expect to be the Chiefs’ starter in 2018, insisted he has gotten better while watching Smith from the sidelines for 15 games this season.

“My knowledge of the game I feel like has taken tremendous leaps,” he said. “Just having a full season, getting to watch [Smith] having a successful year, watching how he studies and how he game-plans and does those things, I feel like it’s helped my game a ton.”

Smith likes what he has seen of his protégé, but pointed out the challenges he’ll face having not played in a game since preseason.

“On the mental side, he’s obviously watching and mentally observing and [taking] mental reps and things like that,” Smith said. “But throughout the week, limited [practice] reps. So he hasn’t been in live bullets since camp. [Regular-season] practices aren’t like that. So in that sense, it’s been a while.’’

Winless watch

The Browns are 0-15 entering Sunday’s season finale against the Steelers and coach Hue Jackson opened his Wednesday’s press conference by asking reporters, “Who’s going to jump in the lake with me?”

Last year, after the Browns went 1-15, Jackson vowed that if Cleveland went 1-15 again this season, people would find him “swimming in [Lake Erie].”

On Wednesday, he told reporters, “I made that statement. I got to back it up.”

By the letter of his statement, though, a loss to the favored Steelers would prevent the Browns from going 1-15 again, because they would be 0-16. But Jackson said he would stick with his promise even if they’re 0-16.

Jackson said he’ll turn his reluctant plunge into an event that will benefit the Hue Jackson Foundation, which supports efforts to combat human trafficking in Cleveland.

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“It’d be something that we’re going to make special,’’ he said. “I don’t like it. Don’t like to do it for the reason why I’m having to do it, but I have to make do on my word. I just think that’s what you do.”

When the swim takes place is up to Jackson, who clearly will wait for warmer weather.

“I never said I could swim,” Jackson said. “There will be some people down there to rescue me pretty quickly. So we’ll make it fun. It’s for the right reason. Again, I don’t take light to things that I say that I put out there. I like to back them up.’’

Speaking of backing up words, Browns owner Jimmy Haslam has told Jackson that he’ll return for a third season in Cleveland and Jackson said: “I unequivocally believe without question that what Jimmy Haslam said is going to happen here. There is nothing that anybody has said to me is making me feel differently.”

Haslam hired a new general manager, John Dorsey, to oversee the football operation, which is 1-30 the past two years.

“You can’t sugarcoat it,” Jackson said. “There’s no way around it. The record is what it is. This is where we are, so we got to find a way to climb out of this hole as fast as we can and get to where I think we should be. I’ve never quit at anything. I’ve never lost like this and I’ve never quit at anything. So if people are thinking I’m going to walk away from this, no.”

Playoff drought to watch

Sunday marks the first time since 2004 the Bills will play their final regular-season game with a chance to make the playoffs.

The last time the Bills qualified for the playoffs was in 1999, when Bill Clinton occupied the White House.

The chances aren’t great, but the Bills can end the longest current playoff drought — the fifth-longest in NFL history — with outside help. The Bills have to beat the Dolphins on Sunday in South Florida, and either have the Ravens lose to the Bengals or have both the Titans and Chargers lose to the Jaguars and Raiders, respectively.

“It’s exciting, I’ve got to believe, for this city,” Bills first-year coach Sean McDermott told reporters this week. “We’re in a position that we haven’t been in, this city hasn’t been in, for a number of years. To me, there’s an electricity about it this time of year to be in this type of situation. It’s a situation that our guys have earned, and I’m proud of them for it.”

The Bills’ season has been a wild one. They got off to a 5-2 start and then slumped before winning three of their past five games, with the two losses in that stretch coming to the Patriots.

If it doesn’t work out Sunday and the Bills don’t make it to next weekend, they will continue in the longest active postseason drought among the four major North American professional sports leagues — a dubious distinction indeed.

Hot team to watch

The Ravens, winners of five of their past six games, will make the playoffs for the first time in three seasons with a home win over the Bengals. It’s that cut and dried.

And, based on the way they have played of late and on their postseason success under coach John Harbaugh when they have been in the playoffs, there is a belief around the Ravens that they could be a force to be reckoned with beyond Sunday.

“Everybody knows that second season we become a different team, a special team,’’ Ravens linebacker Terrell Suggs told reporters this week, according to ESPN.

Since 2008, the Ravens are 10-5 in the playoffs under Harbaugh’s watch, and that includes a Super Bowl title. Only the Patriots, at 11-6, have won more playoff games in the past nine seasons.

The Ravens’ only loss in the past six games was a one-point defeat to the Steelers, and they led that game by nine points in the fourth quarter. In the past six games, the Ravens’ 77-point differential is the best in the NFL other than only the Patriots’ 80-point differential.

In the past eight games, the Ravens’ average of 29.8 points scored per game is bettered by only the Eagles (32.3) and Rams (31.6). Defensively, the Ravens’ 33 takeaways are most in the NFL and their five defensive TDs rank second in the league to only the Jaguars.

This all is what has the Baltimore players so bullish on themselves as the playoffs approach.

“We’re a team, that if we get in, we’ll be a team to be reckoned with,” safety Eric Weddle told reporters.

Defending Super Bowl runner-up to watch

We have arrived at the final Sunday of the regular season and the Falcons, Super Bowl runners-up last season, are not yet in the playoffs.

The Falcons (9-6) play the Panthers (11-4), who already have secured a playoff berth, though they’re still in the hunt for the division title. A Falcons win and they’re in as the final wild card.

The question for the Falcons, as it has been all season, is whether they can score enough points to beat the Panthers, who defeated them 20-17 earlier this season.

A year after averaging 33.8 points per game with current 49ers coach Kyle Shanahan as their offensive coordinator, the Falcons are averaging just 22.1 points this season under Steve Sarkisian. The Falcons are 0-6 when they fail to score 20 points.

“We can’t put ourselves behind the chains with self-inflicted wounds,’’ Falcons quarterback Matt Ryan said. “It’s not that complicated. When we get our opportunities, we’ve got to make plays. Again, we believe we’re going to do that.’’